Email us for technical support: https://www.geeetech.com/contact_us.htm
Facebook Group:
3
SHENZHEN GETECH TECHNOLOGY CO., LTD
1 Attention
1.1 Safety instructions
Please switch to the correct local voltage (110V-220V) before turning on the printer. Be sure
the switch is in the correct position or it will damage the power supply unit (PSU).
Be sure all wires are correctly connected before turning on the printer.
Don’t touch the extruder head or hot bed when printing as they generate high temperature
which may cause burn.
Don’t leave the printer unattended when printing.
1.2 Factory test before delivery
In order to ensure the quality, each printer is tested in the factory before delivery. As a result,
there may be residue in the extruder head or on the hot bed, but it should not affect normal use.
We provide the spare nozzle in the accessory kit just in case.
1.3 Risk statement
1) Before color is mixing or monochrome printing, make sure that there is the filament in the
feeding tube on both sides of the extruder head to prevent back flushing of the molten
filament inside the extruder head, resulting in clogging.
2) Make sure there is filament in feeding tubes on the both side of extruder head even using a
single-sided extruder for monochrome printing, moreover the filament in the other feeding
tube cannot be pulled out during the printing process.
3) Please do not disassemble the printer without permission. If there is any problem, please
end stop ○8X axis end stop ○
bed ○13X axis motor ○14Z axis motor ○15Y axis motor ○16 Power voltage selector switch ○17Y axis
end stop ○18Extruder wire interface ○19Power switch ○20Power socket ○21USB port ○22TF card slot
9
Extruder motors (3 sets) ○
10
Teflon tube ○11Extruder head ○12Hot
7
SHENZHEN GETECH TECHNOLOGY CO., LTD
Gantry kit
Bottom kit
Extruder motors (3 sets)
Filament detector kit (3
sets)
Machine installing screws
Tool kit
5 Assembling
5.1 Assembling the main frame
The main frame consists of the gantry kit and the bottom kit, extruders, filament holder, and
screws. See picture (5-1).
(Picture 5-1)
Assemble the gantry frame and base from bottom to top with 4 M5x35 screws and 4 M5
spring washers. See picture (5-2).
(Picture 5-2)
Assemble and fix the three sets of extruder units to the back side of the top gantry as shown
8
SHENZHEN GETECH TECHNOLOGY CO., LTD
in picture (5-3).
(Picture 5-3)
Filament holder kit was assembled as shown in Picture (5-4) with 4 M3x16 screws, 4 M3
nuts and 4 M3 washers, a total of 3 sets were assembled.
(Picture 5-4)
5.2 Wire connection
Insert the three Teflon tubes into the quick-insert connector of the three extruders
respectively. It can be inserted into the quick- insert connectors of E0, E1 and E2 as needed.
Details see picture (5-5).
9
SHENZHEN GETECH TECHNOLOGY CO., LTD
(Picture 5-5)
Plug the extruder cables into the socket of the extruder head adapter plate, and the buckle
must be fastened. See picture (5-6).
(Picture 5-6)
Connect the motor wires of E0、E1and E2. See picture (5-7).
(Picture 5-7)
Then the extruder wire and the motor extruder wire are fixed into the small hole on the
backside of the screw with the Cable tie to avoid the wire harness touching the model
during printing. In addition, the position the harness fixed needs to reserve the length of the
Z-axis at the maximum height. See picture (5-8).
10
SHENZHEN GETECH TECHNOLOGY CO., LTD
(Picture 5-8)
Connect the wires of X axis’ motor and end stop. See picture (5-9).
(Picture 5-9)
Connect the wires of Y axis’ motor and end stop. See picture (5-10).
(Picture 5-10)
11
SHENZHEN GETECH TECHNOLOGY CO., LTD
Connect the wires of Z axis’ motor and end stop. See picture (5-11).
(Picture 5-11)
5.3 Check the power input mode
The factory default voltage is 230V. You need to choose the correct voltage according to your
local standard requirement. See picture (5-12)
Note: Be sure the voltage is switched to the correct one.
5.4 Check the filament
Put the filament on the spool holder. Please pay attention to the feeding direction of the filament.
See picture (5-13).
(Picture 5-12)
12
SHENZHEN GETECH TECHNOLOGY CO., LTD
(Picture 5-13)
Since the filament is bent, the first section of it needs to be straightened by hand and trimmed to
make it easier to insert the filament into the feeder. Press down the lever handle of the extruder
and insert the filament into the feeding tube until it reaches the extruder head. See picture
(5-14).
When print PLA, set the target nozzle temperature about (190~210℃). When the temp is stable,
control the extruder filament feeding on LCD screen (“Move axis”), feed until there is molten
material flowing from the nozzle.
(Picture 5-14)
13
SHENZHEN GETECH TECHNOLOGY CO., LTD
Observe the nozzle, if there is no filament stuck and the filament is coming out smoothly, then
stop filament feeding, clear the nozzle with tweezers. See picture (5-15).
(Picture 5-15)
14
SHENZHEN GETECH TECHNOLOGY CO., LTD
6 First print
6.1 Level the print bed
The first layer is basis to a successfully printed model. The factory default setting is a little high in
order to avoid scratching the hotbed with the nozzle, so users need to adjust the distance
between nozzle and hotbed again. After the first-time bed leveling, users don’t need to level the
bed again.
Rough leveling
Home the printer first (“Prepare”> “Auto home”), then it shows the option “Level corners” on
the LCD screen. Put a piece of A4 paper on the platform, click “Next corner”, the extruder head
moves counterclockwise from the bottom left corner to the four corners of the platform. See
picture (6-1, and 6-2).
(Picture 6-1)
(Picture 6-2)
When the extruder head moves to the left bottom, adjust the corresponding knob until the
distance between the nozzle and bed is about the thickness of a piece of paper (about
0.1-0.2mm). Slide the paper back and forth to see if you feel a slight resistance. If yes, it means
the leveling of this corner is finished and you can proceed to level the rest corners with the same
method. See picture (6-3).
15
SHENZHEN GETECH TECHNOLOGY CO., LTD
(Picture 6-3)
Accurate leveling
If you level the bed with A4 paper, the first layer maybe too high, too low or moderate.
a. Too high: the distance between the nozzle and bed is too far, which may cause the filament to
not stick or not stick well. See picture (6-4).
(Picture 6-4)
b. Too low: the distance between the nozzle and the bed is too close, which prevents the filament
from coming out and causes the extruder gear to click, and even worse, scratch the nozzle on the
bed. See picture (6-5).
(Picture 6-5)
c. Moderate: Extrude the filament properly and evenly stick on the bed. See picture (6-6).
(Picture 6-6)
In the case of too low and too high, adjust the knobs under the platform till they are moderate. It
may take some trial and error to achieve the best result. An example of good first layer, see
picture (6-7).
16
SHENZHEN GETECH TECHNOLOGY CO., LTD
(Picture 6-7)
Note:
If turn the knobs clockwise, the platform will rise, and vice versa.
Avoid the nozzle touching the bed; use a piece of A4 paper. Or it will scratch the bed.
Insert the TF card into the slot. See picture (6-8).
(Picture 6-8)
Press and rotate the knob to enter the main menu. Select the option of "Print from SD". See
picture (6-9).
(Picture 6-9)
17
SHENZHEN GETECH TECHNOLOGY CO., LTD
Choose the files in the TF card. See picture (6-10).
(Picture 6-10)
The printer will heat automatically. See picture (6-11).
(Picture 6-11)
When heating done, the printer will start printing until the print is complete. See picture (6-12,
6-13).
(Picture 6-12)
18
SHENZHEN GETECH TECHNOLOGY CO., LTD
(Picture 6-13)
19
SHENZHEN GETECH TECHNOLOGY CO., LTD
7 Introduction to the LCD menu
7.1 Tree diagram
(Picture 7-1)
20
SHENZHEN GETECH TECHNOLOGY CO., LTD
7.2 Main functions
LCD rotating knob:
Press the knob: Confirm or enter the next menu.
Rotate the knob: Roll the select options or change parameters.
LCD homepage, see picture (7-2):
1. Extruder temperature: Current temp/target temp
2. Hot bed temperature: Current temp/target temp
3. Extruder head blower status
4. Current Z axis value
5. Printing process
6. Current printing info
7. Feed rate: Current printing speed
8. Mix-color printing ratio: E0; E1; E2%
Note: Rotating the knob can change the printing feed rate during printing. We suggest users not
changing the feed rate too much or it will make the motors to skip caused by too fast speed
and affect the print quality.
Press the knob to enter the next menu (Picture 7-3, 7-4):
Prepare: Prepare and test the printer before normal operation
Control: Printer temp and motion parameter setting
Mixer: Mix-color ratio setting
Print from SD: TF/SD card printing
About Printer: The printer info
(Picture 7-2)
21
SHENZHEN GETECH TECHNOLOGY CO., LTD
(Picture 7-3) (Picture 7-4)
The main functions of Prepare menu (Picture 7-5, 7-6):
Move axis: Move X/Y/Z axis and Extruder
Auto home: X/Y/Z axis auto homing
Disable steppers: Unlock motors
Change filament: Change filament
Preheat PLA: Manually pre-heat the hot bed and extruder before printing PLA.
Preheat ABS: Manually pre-heat the hot bed and extruder before printing ABS.
(Picture 7-5) (Picture 7-6)
The main functions of Control menu (Picture 7-7, 7-8):
Temperature: Change the temp of the hot bed and extruder in real time
during printing. Customize the temp of preheat PLA and preheat ABS.
Motion: Motion parameter setting in firmware. After modification, choose
“store memory” to save the change.
Filament: Open or close filament detector; set filament diameter.
Store settings: Save the parameters modified.
Load settings: If you need to restore to the original settings, please choose
Color Mixer enables multicolor models to be printed by adjusting the extruder discharge ratio to
the original single-color model. The specific steps are as follows:
Click “Import G” to import .Gco file. Choose 3 as the “Extruder Number”. See picture (9-1
and 9-2)
44
SHENZHEN GETECH TECHNOLOGY CO., LTD
(Picture 9-1)
(Picture 9-2)
After importing the .Gco file, you can set the height of start and end layer, and the discharge
change percentage of extruders according to actual needs. You can adjust by dragging the
slider or entering a value. See picture (9-3).
In addition, you can click “Add” to add multiple configuration boxes to adjust the extruder
discharge change ratio at different starting and ending heights. As shown in picture (9-4).
45
SHENZHEN GETECH TECHNOLOGY CO., LTD
(Picture 9-3) (Picture 9-4)
See picture (9-5), Adjust discharge change ratio of each extruder in a range of heights as
needed, click the E0, E1, E2 button in the “Preview” window in the upper right corner to
enter the color selection interface, as shown in Picture (9-6). The color here should be
selected according to the actual filament color of each extruder, and then click "Select" to
confirm. After selecting corresponding color to each extruder, click the “Preview” button
below to display color change of the current configuration in the box on the right side of the
small window.
46
SHENZHEN GETECH TECHNOLOGY CO., LTD
(Picture 9-5) (Picture 9-6)
After configuring the parameters, click the “Mix Color” button to change the original
single-color model to a custom multicolor model. As shown in Picture (9-7).
Click “Export G”to export and save the mixed color model, which is named with a suffix
“_colored”. Copy the file to the TF card and insert it into the machine to start printing. See
picture (9-8, and 9-9). The processed model is shown in picture (9-10).
47
SHENZHEN GETECH TECHNOLOGY CO., LTD
(Picture 9-7) (Picture 9-8)
(Picture 9-9)
(Picture 9-10)
48
SHENZHEN GETECH TECHNOLOGY CO., LTD
10 Function introduction
10.1 Power loss-resuming capability
A20T has the power loss-resuming capability. When power recovery starts, it will pop up a dialog
to ask if continuing the unfinished print caused by power outage, choose “Resume print”. See
picture (10-1).
(Picture 10-1)
When it reaches the target temperature, the X and Y axes will auto home. The extruder will
extrude the residue in the nozzle. Use a tweezers to clean the nozzle before starting printing
again.
Note:
When power outage, move the nozzle away from the printing model in case the filament
oozes out on to the print.
Be sure to clean the residue in the nozzle before restarting the print or it would affect the
quality of the print.
10.2 Reset button
The reset button is below the knob. When the printer works abnormally, press the reset button
to reset the printer to avoid any damage. See picture (10-2).
(Picture 10-2)
49
SHENZHEN GETECH TECHNOLOGY CO., LTD
10.3 Filament run-out sensor (Optional)
Before using this function, please check whether it is turned on or not. Choose
“Control”>”Filament”>“Runout sensors” and make sure it shows “ON”. See pictures (10-3,
10-4).
(Picture 10-3) (Picture 10-4)
It will pop up the notification “Err: No Filament” when the filament is run out during
printing and the printer will stop. See picture (10-5).
Press the extruder handle, remove the remaining filament before loading the new filament.
When the filament is loaded, use a tweezers to clean the nozzle. Press the knob to enter the
main menu, and choose “Resume print” to re-start the printing. See picture (10-6).
(Picture 10-5) (Picture 10-6)
10.4 3D touch for auto bed leveling (Optional)
This printer supports auto bed leveling. Refer to the link below to know how to install the 3d
touch sensor.
https://www.youtube.com/watch?v=_RtsZDbR2po&t=66s
Visit our official forum
http://www.geeetech.com/forum/
50
SHENZHEN GETECH TECHNOLOGY CO., LTD
11 FAQ (Frequently Asked Questions)
11.1 Abnormal extrusion
The filament is tangled
The nozzle temp is too low to reach the melting temperature required.
There is carbonized residue inside the nozzle. Please replace it with the spare nozzle
Insufficient heat dissipation of radiator of the extruder head causes the filament in the
tube to melt in advance and the extrusion strength is insufficient. Please check whether
the cooling fan works normally.
The printing speed is so fast that the extruding speed can’t match it. Please reduce the
printing speed.
11.2 The gear of the extruder skips and makes an abnormal
noise
The nozzle is clogged; please refer to 11.1 abnormal extrusion.
Check whether the friction force between the extruder gear and the filament is enough.
Please clean the residue.
Check whether the voltage of the driver of the extruder is normal, and try to increase it
by 0.1v until it works normally, max 1.2v.
11.3 First layer abnormal
Non-stick: a. the nozzle is too far from the hot bed. Please re-level the bed, try to stick
masking paper or glue stick on the surface of the hot bed.
Not extruding and the bed scratched: a. the nozzle is too close from the hot bed. Please
re-level the bed; b. check if the nozzle extrusion normal.
11.4 Layer shift
The printing speed is too fast. Please slow it down.
The belt of X or Y axis is too lose. Please tighten it.
The X or Y axis synchronization wheel is not fixed firmly. Please adjust the eccentric nuts.
The voltage of the driver of X/Y axis is too low.
51
SHENZHEN GETECH TECHNOLOGY CO., LTD
11.5 Print stopped
USB printing: the signal is interfered. Please copy the model to TF card and print via TF card.
TF card printing: the gcode file in the TF card is abnormal, please slice again.
The quality of the TF card is poor. Please try another TF card.
The power supply voltage in the area is not stable; please print after the voltage is